Portable stoves for burning gaseous fuel



Aug. 25, 1964 E. R. A. F. BROECKER Filed Feb. 15, 1962 PORTABLE STOVES FOR BURNING GASEOUS FUEL 2 Sheets-Sheet 1 INVENTOR ERNST R. A F. BROECKER BY %W, MMMQM ATTORNEYS 25, 1964 E. R. A. F. BROECKER 3,145,704

PORTABLE STOVES FOR BURNING GASEOUS FUEL F'iled Feb. 15 2 2 Sheets-Sheet 2 INVENTOR ERNST RAF BROECKNER M w H m WSW fim ma W ATTORNEYS United States Patent 3,145,704 PORTABLE STOVES FOR BURNING GASEOUS FUEL Ernst Reinhold Albert Friedrich Broecker, Schwahisch Hall, Germany, assignor to Aktiebolaget Bahco, Stockholm, Sweden, a corporation of Sweden Filed Feb. 15, 1962, Ser. No. 173,380 Claims priority, application Sweden Mar. 27, 1961 4 Claims. (Cl. 12638) The present invention relates to a portable stove for burning gaseous fuel and comprising a box accomodating two gas-burners which are controlled by means of control knobs at the front of the box and supplied with fuel from one or the other of two fuel containers, which in the Working position of the stove are placed outside of the box and connected to the burners by a flexible tube or the like, but during transport of the stove are intended to be situated within the box, said box being provided with a grate foldable up and down and at each end wall with a plate foldable up and down, which plates together with a lid for the box form a wind-shield for the burners.

One of the main objects of the present invention is to make sure that none of the burners can be connected to any of the fuel containers and ignited before the container has been removed from the box and that if only one burner is used the other container is well shielded from the radiation heat from the burner in operation.

This is in accordance with the present invention achieved in that each of the wind-shield plates at opposite end walls of the box in the folded down position covers the adjacent burner and is so shaped that together with the adjacent end wall of the box it forms a space adapted to accommodate a fuel container, which in the storage position rests on the wind-shield plate so that the folding up of this plate for uncovering the adjacent burner is impossible before the fuel container is removed out of the box, and simultaneously the fuel container in said space is protected against the radiation heat from the other burner by the folded down wind-shield plate.

In a suitable embodiment of the invention the up and down foldable grate is so arranged that the folding up and down of the wind-shield plates and the insertion and removing of the fuel containers can take place only after folding up the grate.

The invention will be described more in detail in connection with an embodiment shown on the attached drawings.

FIG. 1 shows the stove according to the invention in perspective and in position for operation of one of the two burners.

FIG. 2 shows the stove, also in perspective, but with the elements in position for cleaning the space underneath the burners.

According to the shown embodiment the stove comprises a box 1 with an up and down foldable lid 2 which can be locked in the closed position by means of a locking means 3 on the lid, said locking means being adapted to cooperate with a locking element 4 on the box. The locking means 3 is so constructed that in the locking position it also serves as a carrying handle for the stove in its transport position. The box consists of a bottom 5 and two end walls 6 integral with the bottom and each of which is provided with an elongated opening 7 which serves as an air supply opening and as a handle opening when it is desired to move the stove in its working position. The front and back walls 8 and 9 respectively are by means of two bars 10 connected to a frame which by means of pivot pins 11 is foldably connected to the end walls near the rear part of the box. This frame 8-10 also serves to support two burners 12 by means of a gas-supply pipe 13 attached to the back wall 9 and control knobs "Ice . 14 situated at the front wall for actuating control valves 15 for the two burners. By having the box constructed in this Way and by attaching the burners 12, gas supply pipe 13, valves 15 and control knobs 14 in the frame foldable up and down relatively to the rest of the box, is is achieved that the interior of the box is very easily accessible for cleaning purposes, as shown in FIG. 2.

At the back wall 9 there is further provided an up and down foldable grate 16 known per se. Furthermore at the bottom 5 of the box a wind-shield plate 17 is provided in the immediate vicinity of each end Wall 6, said plate being provided with hinge pins cooperating with hinge mountings 18a at the bottom 5 so that the plate can be folded from a folded down position (to the right in FIG. 1) to an upright position (to the left in FIG. 1). The front hinge pin of each windshield plate 17, is so constructed that when the frame is folded down it projects beyond an abutment 18 on the front wall 8 and locks the frame in its folded down position. As is to be seen from FIG. 1 each wind shield plate is so shaped that in the folded down position it forms together with the adjacent end wall 6 a space for accommodating a gas container 19 and also with its front portion it covers the adjacent burner 12. On account of this construction of the wind-shield plates 17 it is achieved that these cannot be folded up in order to uncover the burners before the gas container 19 resting on the respective wind-shield plate has been removed from the box. Simultaneously it is observed that if only one of the burners is to be used the gas container associated with the other burner will be protected against the radiation heat from the burner used. In order to furthermore guarantee that a gas container cannot be connected to the connecting flexible tube 20 via the gas supply pipe 13 the length of the space is so chosen relatively to the length of the gas container that the flexible tube cannot be connected as long as the container remains in the box. Suitably the box has a pair of supporting legs 21 at the lower side of the bottom 5.

As shown in FIGS. 1 and 2 the front wall 8 and the back wall 9 are suitably provided with an inwardly pressed centre portion in such a Way that the control knobs 14 do not project beyond the box but are well protected and simultaneously easily accessible, and that a recess is obtained at the back wall for receiving the flexible tube 20 in the transport position of the stove.

The invention is not limited to the now shown and described embodiment but may be varied in many ways within the scope of the invention.

I claim:

1. A portable stove for burning gaseous fuel comprising a bottom of rectangular shape, end walls of substantially equal height extending from margins of said bottom, a front wall, a back wall, two burners disposed within an area defined by said walls, control means operatively connected to said burners, pipe means connected to said burners to supply gaseous fuel thereto, grate means pivotally mounted to one of said front and back walls to overlie said burners when at least one of said burners is burning gaseous fuel, a lid plate for movement from a horizontal to a vertical position and pivoted on an axis perpendicular to said end walls and pivotally connected to at least one of said walls, wind-shield plates each pivotally connected to said bottom adjacent an end wall on an axis extending parallel to said end wall, each wind-shield plate defining when in an inoperative position a space disposed between the adjacent end wall and one of said burners disposed adjacent thereto and a portion of said wind-shield plate overlying said burner, a gaseous fuel container being accommodated within each space of each wind-shield plate when in said inoperative position, said grate means overlying said wind-shield plates in said inoperative position, each of said burners only being useable upon said grate means being raised, one fuel container removed from its space, the wind-shield plate from whose space the fuel container was removed being raised to an operative position to form a wind-shield together with said lid plate, and expose the burner while the other windshield plate can remain in said inoperative position, said grate then being replaced to overlie the exposed burner and other wind-shield plate if in said inoperative position, and means for connecting the removed fuel container with said pipe means to supply the gaseous fuel to the exposed burner while the other wind-shield plate if in said inoperative position protects the other fuel container in its space from radiation emanating when the exposed burner is burning.

2. A portable stove according to claim 1 in which bar means are disposed between said front and back walls to form a frame, and means pivotally connect said frame to said end walls.

3. A portable stove according to claim 1 in which said end walls have openings therein serving as air supply openings for said burners.

4. In a portable stove structure, a bottom of rectangular shape, end walls of substantially equal height extending from the margins of said bottom, a front wall and a back wall, said walls defining a burner area in which two burners are disposed, wind-shield plates each being pivotally mounted adjacent an end wall to be movable to an operative position to define a wind-shield and an inoperative position having a portion overlying one of said 30 burners, each wind-shield plate defining a space between the end wall and the burner over which said portion lies, a fuel container being accommodated within said space when the wind-shield plate is in its inoperative position, and grate means pivotally mounted to one of said front and back walls, said grate means in its lower position overlying said wind-shield plates and said fuel containers in said spaces when these wind-shield plates are in said inoperative position, said grate means being raisable to allow removal of one of said fuel containers while the windshield plate from whose space the fuel container was removed is moved to said operative wind-shielding position to expose the burner over which said portion of said windshield plate was overlying and said grate means being replaceable over the exposed burner and the other windshield plate if it is maintained in its inoperative position which portion of this inoperative wind-shield plate will then protect the fuel container in its space from radiation which emanates from the exposed burner.

References Cited in the file of this patent UNITED STATES PATENTS 1,561,672 Strong Nov. 17, 1925 2,852,016 Weatherwax Sept. 16, 1958 FOREIGN PATENTS 1,117,144 France Feb. 20, 1956 OTHER REFERENCES Prepo Camp Stove: Prepo Corporation Advertisement; Form No. 73026. 

1. A PORTABLE STOVE FOR BURNING GASEOUS FUEL COMPRISING A BOTTOM OF RECTANGULAR SHAPE, END WALLS OF SUBSTANTIALLY EQUAL HEIGHT EXTENDING FROM MARGINS OF SAID BOTTOM, A FRONT WALL, A BACK WALL, TWO BURNERS DISPOSED WITHIN AN AREA DEFINED BY SAID WALLS, CONTROL MEANS OPERATIVELY CONNECTED TO SAID BURNERS, PIPE MEANS CONNECTED TO SAID BURNERS TO SUPPLY GASEOUS FUEL THERETO, GRATE MEANS PIVOTALLY MOUNTED TO ONE OF SAID FRONT AND BACK WALLS TO OVERLIE SAID BURNERS WHEN AT LEAST ONE OF SAID BURNERS IS BURNING GASEOUS FUEL, A LID PLATE FOR MOVEMENT FROM A HORIZONTAL TO A VERTICAL POSITION AND PIVOTED ON AN AXIS PERPENDICULAR TO SAID END WALLS AND PIVOTALLY CONNECTED TO AT LEAST ONE OF SAID WALLS, WIND-SHIELD PLATES EACH PIVOTALLY CONNECTED TO SAID BOTTOM ADJACENT AN END WALL ON AN AXIS EXTENDING PARALLEL TO SAID END WALL, EACH WIND-SHIELD PLATE DEFINING WHEN IN AN INOPERATIVE POSITION A SPACE DISPOSED BETWEEN THE ADJACENT END WALL AND ONE OF SAID BURNERS DISPOSED ADJACENT THERETO AND A PORTION OF SAID WIND-SHIELD PLATE OVERLYING SAID BURNER, A GASEOUS FUEL 